How to improve the efficiency of the motor
Someone asked: What are the doorways of high-efficiency motors, and is it more than just using multiple materials? Operating motor sales for many years, there has never been such a big pressure recently, obviously feeling that customers are more and more demanding on motors, especially in terms of high efficiency and energy saving, it is not easy to use materials well, use enough and so on, after all, each company has cost pressure. High-efficiency motors are indeed not just about using multiple materials. To some extent, multi-use materials may be the main constraint on efficiency gains.
Energy and environmental protection pressure forces motors to upgrade efficiently
The energy crisis and environmental protection issues have become barometers for the normal operation of various industries, and people are paying more and more attention to the efficiency of energy utilization. Although the efficiency of motors in converting electrical energy into mechanical energy is already high, the highest efficiency is never-ending. In order to reasonably match the motor with the application, it is necessary to continuously carry out design optimization and technological innovation, and even achieve high efficiency→ ultra-high efficiency→ and ultra-high efficiency.
How to improve motor efficiency?
Studying motor efficiency is essentially to analyze the process of various losses and understand the key factors affecting various losses.
● Reduces the loss when current flows through the winding. One of the most direct ways to improve motor efficiency is to reduce armature winding losses. For example, by increasing the groove area so that more copper is used to increase the cross-sectional area of the winding, the resistance is reduced, so that the loss when the current flows through the winding is reduced.
●Control of iron core loss. The loss of the iron core is related to two major factors: magnetic flux density and frequency in the iron core. Usually the power supply frequency is fixed, so in order to reduce the loss of the core, the method of lengthening the core is generally adopted.
●The improvement of efficiency is closely related to material consumption. In order to achieve the required energy consumption level, an increase in the amount of copper used and the volume of the iron core is inevitable. However, the reduction in losses is not always positively correlated with the increase in copper and iron consumption. When the cross-section of the core and coil increases to a certain extent, the loss will increase, because the increase in the volume of the core will also increase the loss of the core and coil, and if it exceeds the reduction caused by the reduction of resistance and the desaturation of the core, the efficiency will be reduced. There may be a point beyond which the loss will actually increase when the core volume is increased. Similarly, for a certain magnetic flux density, eddy current losses can be reduced by using thinner laminations.
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